"I definitely won't be playing in the preseason, that's for sure," Fox said. "I don't think I'll be ready for opening night. But we're going to play it by ear. I feel like I can play right now. But I don't have that [medical] expertise. I'm not going to lie to you: I was running 15 miles per hour already [on a treadmill]. I think that's probably faster than most of the guys that are here. So, when I say I think I'm ready, I for real think I'm ready."